From johnlittle.org, It would appear that Dell are about to offer supported, pre-installed Ubuntu on their machines. This is a huge step forward for Linux, I am a little cautious until I see the machines showing up on dell.com, but it does make sense that they are choosing Ubuntu as Michael Dell is already reported to be Ubuntu(at the time of writing it shows him as running Ubuntu Feisty on a Dell Precision M90). Hopefully with a manufacturer as big as Dell on board more and more hardware manufacturers will be forced to provide good (and with luck open) drivers for the platform.